I'm sorry for your loss.
Little Gray Guy reminded me so much of my own gray girl who I lost about 2 years ago. Although I have three boys (including the
one I rescued this past fall), she was something special and I still miss her deeply.
There are several semi-strays that roam our neighborhood, so I buried her in a special place in a flowerbed - the location where I got a great photo of her - and topped it with a couple of pavers. I put her food and water bowl out there, and it's sort of a memorial feeding station. It gives me something to tend to and remember her..